package com.tedu.springboot2302.controller;

import com.tedu.springboot2302.entity.Article;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.ArrayList;
import java.util.List;

@Controller
public class ArticleController {
    private static File articles;
    static{
        articles=new File("./articles");
        if(!articles.exists()){
            articles.mkdirs();
        }
    }
    @RequestMapping("/writeArticle")
    public void writeArticle(HttpServletRequest request, HttpServletResponse response)  {
        System.out.println("文章开始发表了");
        String title = request.getParameter("title");
        String author = request.getParameter("author");
        String content = request.getParameter("content");

        if(title==null||title.isEmpty()||
        author==null||author.isEmpty()||
        content==null||content.isEmpty()){
            try {
                response.sendRedirect("/writeArticle.html");
            } catch (IOException e) {
                e.printStackTrace();
            }
            return;
        }

        Article art = new Article(title,author,content);
        File file =  new File(articles,title+".obj");
        if(file.exists()){
            try {
                response.sendRedirect("/article_fail.html");
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        try (
                FileOutputStream fos = new FileOutputStream(file);
                ObjectOutputStream oos = new ObjectOutputStream(fos);
                ){
            oos.writeObject(art);
            response.sendRedirect("/article_success.html");
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    @RequestMapping("/articleList")
    public void articleList(HttpServletRequest request,HttpServletResponse response){
        System.out.println("文章列表处理开始了");
        List<Article> art = new ArrayList<>();
        File[] artList = articles.listFiles(f->f.getName().endsWith(".obj"));
        for(File sub : artList){
            Article article = null;
            try (
                    FileInputStream fis = new FileInputStream(sub);
                    ObjectInputStream ois = new ObjectInputStream(fis);
                    ){
                article = (Article) ois.readObject();
                art.add(article);
            } catch (IOException e) {
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
        }

        response.setContentType("text/html;charset=utf-8");
        PrintWriter pw = null;
        try {
            pw = response.getWriter();
            pw.println("<!DOCTYPE html>");
            pw.println("<html lang=\"en\">");
            pw.println("<head>");
            pw.println("<meta charset=\"UTF-8\">");
            pw.println("<title>文章列表</title>");
            pw.println("</head>");
            pw.println("<body>");
            pw.println("<center>");
            pw.println("<h1>文章列表</h1>");

            pw.println("<table border='2'>");

            pw.println("<tr>");
            pw.println("<td>标题</td>");
            pw.println("<td>作者</td>");
            pw.println("<tr>");

            for(Article article:art){
                pw.println("<tr>");
                pw.println("<td>"+article.getTitle()+"</td>");
                pw.println("<td>"+article.getAuthor()+"</td>");
                pw.println("<tr>");
            }

            pw.println("</table>");

            pw.println("</center>");
            pw.println("</body>");
            pw.println("</html>");


        } catch (IOException e) {
            e.printStackTrace();
        }
        pw.println();

    }


}
